Combustion apparatus

ABSTRACT

A combustion apparatus according to one aspect of the present invention comprises a fuel storage container for storing fuel, a combustor having a certain length and connected to the fuel storage container and a pipe so as to be supplied with fuel and combust fuel, an air blower disposed at one end of the combustor and supplying air into the combustor, and a flame plate disposed over the combustor in a longitudinal direction and perfectly combusting air that is imperfectly combusted in the combustor. The combustor has a groove formed in a longitudinal direction of the combustor, an ignition heater disposed in the longitudinal direction of the groove and generating heat, an ignition wick disposed over the ignition heater, absorbing fuel, and igniting by heat, and a pair of combustion wicks disposed in the longitudinal direction of the combustor so as to be spaced away from the ignition wick by a certain distance and combusting fuel.

TECHNICAL FIELD

The present invention relates to a combustion apparatus, and inparticular to a combustion apparatus which is able to efficientlycombust a fuel oil, for example, a liquid state animal oil, a liquidstate plant oil, etc., which is not readily ignited due to a relativelyhigh ignition point and tends to generate a lot of tar due to a highviscosity.

BACKGROUND ART

The global warming is in quick progress due to the increase in carbondioxide which generates during the combustion of fossil fuel. As thefossil fuel is gradually depleted, the interest in an alternative energywhich might substitute such fossil fuel is increasing.

The interest in the alternative energy has brought in a new term calleda green growth.

The aforementioned green growth is a novel concept wherein a weatherchange and an environment damage can be reduced in such a way to saveand efficiently use energy and resource, and a self-reliance on energycan be obtained, and any economic crisis can be recovered through aresearch and development process on a clean energy and a greentechnology, thus seeking a new growth driving source and providing morejob opportunities. The term of the aforementioned green growth was firstused by the magazine “Economist” in January, 2000 and started to bewidely used by the Davos Forum.

The slogan “Seoul Initiative (SI) for Green Growth” was adapted in theMECD 2005 (Ministerial Conference on Environment and Development in Asiaand the Pacific 2005), and the UNESCAP (UN Economic and SocialCommission for Asia and the Pacific) actually started a discussionthereon.

The policy of the green growth is directed to an efficient greenhousegas reduction, a de-oil, an energy self-reliance reinforcement, and aweather change adaptation power enforcement (a weather change adaptationand an energy self-reliance), a green technology development, a growthdriving source motorization, an industrial greening movement, a greenindustry growth, an advanced industrial structure, and a green economyfoundation establishment (a new growth driving source creation), and agreen land and a green traffic establishment, a green revolution inlife, and a worldwide green growth model nation embodiment (a lifequality improvement and a nation status enforcement).

As the interest in the green growth is increasing, there is an effortwherein an eco-friendly liquid animal or plant oil is more used than aconventional fossil fuel in case of the fuel which is used in acombustion apparatus.

The fossil fuel generates carbon dioxide during the combustion. Thethusly generated and emitted carbon dioxide may cause a part of theglobal warming. The plant oil may generate carbon dioxide during thecombustion, but the plant which is the material of the plant oil absorbsthe carbon dioxide in the air when it grows. The actual total amount ofthe carbon dioxide which is generated due to the use of the plant oilmay be zero since the amount of the carbon dioxide generated during thecombustion of the plant oil can be offset with the amount of the carbondioxide which is absorbed during the growth of the plant.

Despite of the aforementioned advantages of the liquid animal or plantoil, it is not actually used as a fuel of the combustion apparatus sincethe liquid animal or plant oil has a high ignition point, which entailsa bad ignition ability, whereupon a lot of tar generates. For the use ofa fuel oil, an ignition ability should be high, and the viscosity shouldbe low enough for it to roll. In order for the liquid animal or plantoil to be used as a fuel oil in consideration of the aforementionednatural characteristics of the liquid animal or plant oil, the liquidanimal or plant oil should be processed to have a low viscosity.Processing the liquid animal or plant oil costs a lot, for which the useof the liquid animal or plant oil is not economical.

[For the aforementioned problems, it urgently needs to develop a newcombustion apparatus which is able to use, as a fuel oil, a liquidanimal or plant oil which has a bad ignition ability and a highviscosity without processing the liquid animal or plant oil.

DISCLOSURE OF INVENTION Technical Problem

Accordingly, the present invention is made in an effort to resolve theabove-mentioned problems. It is an object of the present invention toprovide a combustion apparatus which is able to readily ignite a liquidanimal or plant oil which has a bad ignition ability since it has a highignition point.

It is another object of the present invention to provide a combustionapparatus which is able to reduce the generation amount of tar with theaid of the complete combustion of a liquid animal or plant oil.

It is further another object of the present invention to provide acombustion apparatus which is able to simultaneously supply a hugeamount of fire power in a large space, for example, of a factory, avinyl house and a combined heat and power plant.

Technical Solution

To achieve the above object, there is provided a combustion apparatus,which may include, but is not limited to, a fuel storage container whichis adapted to store fuel; a combustor which has a certain length andconnected to the fuel storage container and a pipe so as to be suppliedwith fuel and combust fuel; an air blower which is disposed at one endof the combustor and supplying air into the combustor; and a flame platewhich is disposed over the combustor in a longitudinal direction andconverge the flame or gas to the flame and perfectly combusting flame orgas that is imperfectly combusted in the combustor, wherein thecombustor may include a groove which is formed in a longitudinaldirection of the combustor; an ignition heater which is disposed in thelongitudinal direction of the groove and generating heat; an ignitionwick which is disposed over the ignition heater, absorbing fuel, andigniting by heat; and a pair of combustion wicks which are disposed inthe longitudinal direction of the combustor so as to be spaced away fromthe ignition wick by a certain distance and combusting fuel.

The combustor further may include a combustion chamber wherein the fuelsupplied from the fuel storage container can be combusted; and an airsupply chamber which is able to receive air from the air blower andsupply the air to the combustion chamber, wherein a plurality of airholes are formed between the air supply chamber and the combustionchamber so as to supply air of the air supply chamber in order for thefuel, which has been supplied into the combustion chamber, to beefficiently combusted.

The combustor may include an inner wall which is equipped with aplurality of air holes at its side surface; and an outer wall which isinstalled spaced apart at a certain distance from the inner wall from anouter side of the inner wall and defines the air supply chamber togetherwith the inner wall.

The air hole may include a first combustion air hole which is formed ata lower portion of the inner wall and is adapted to supply air whichwill be used to first combust the fuel stored in the combustion chamber.

The air hole may include a second combustion air hole which is formed atan upper portion of the first combustion air hole and is adapted tosecond combust the fuel which has been first com busted.

The air hole may further include a plurality of flame alignment airholes which are formed at regular distances at an upper portion of thesecond combustion air hole and are adapted to align toward the centerthe flame which has been com busted in the combustion chamber.

There may be further provided a metallic fuel supply pipe which isinstalled extending from the groove, wherein a fuel adjusting device isprovided between the fuel supply pipe and the pipe so as to adjust theamount of the fuel which is inputted into the combustor.

The air blower may include an air blowing fan which is engaged to amotor shaft and is adapted to generate wind; and an air blowing ductwhich is able to guide toward the air supply chamber the air which isbeing blown from the air blowing fan, wherein the air blowing duct isequipped with a through hole through which the fuel supply pipe passesthrough.

The flame plate may include a ceramic member which is provided at anupper portion of the combustor and is able to completely combust thegas, which has been incompletely combusted by the combustor, in such away to reheat the incompletely combusted gas; and a discharge port whichis formed smaller than the width of the combustion chamber with the aidof the ceramic member, thus discharging the gas combusted by thecombustor.

A fuel pump is installed at the pipe so as to smoothly supply the fuelto the combustor.

Advantageous Effects

In the combustion apparatus of the present invention, it is possible toreadily ignite a fuel, for example, a liquid animal or plant oil, whichhas a bad ignition ability since it has a high ignition point.

Moreover, the generation amount of tar can be reduced since it ispossible to completely combust a fuel, for example, a liquid animal orplant oil the complete combustion thereof was difficult.

Furthermore, the combustion apparatus of the present invention has acertain length, whereupon it is possible to simultaneously supply a hugeamount of firepower in a large space, for example, of a factory, a vinylhouse and a combined heat and power plant.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a perspective view illustrating the whole configuration of acombustion apparatus according to an embodiment of the presentinvention.

FIG. 2 is an enlarged perspective view illustrating a combustoraccording to an embodiment of the present invention.

FIG. 3 is a cross sectional view illustrating a combustor and a flameplate according to an embodiment of the present invention.

FIG. 4 is a perspective view illustrating an air blower according to anembodiment of the present invention.

MODES FOR CARRYING OUT THE INVENTION

The combustion apparatus according to an embodiment of the presentinvention will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view illustrating the whole configuration of acombustion apparatus according to an embodiment of the presentinvention. FIG. 2 is an enlarged perspective view illustrating acombustor according to an embodiment of the present invention. FIG. 3 isa cross sectional view illustrating a combustor and a flame plateaccording to an embodiment of the present invention.

As illustrated in FIGS. 1 to 3, the combustion apparatus 10 according toan embodiment of the present invention may include, but is not limitedto, a fuel storage container 100 adapted to store fuel, a combustor 200which is connected to the fuel storage container 100 via a pipe 120 andis adapted to receive and combust the fuel, an air blower 300 which isprovided at an end portion of the combustor 200 and is adapted to supplyair to the combustor 200, and a flame plate 400 which is provided in thelongitudinal direction at the top of the combustor 200 and is adapted tocompletely combust the air which has been incompletely combusted by thecombustor 200.

The fuel oil used in the combustion apparatus 10 according to anembodiment of the present invention may be a fuel which has a highviscosity like an animal or plant oil (including a waste edible oil) ofa liquid phase.

The fuel storage container 100 adapted to store fuel oil may be providedseparate from the combustor 200. Since the filling amount of the fuel,for example, a liquid animal or plant oil, is determined based on thecapacity of the fuel storage container 100, a lot of fuel can be filledand stored at a time by increasing the volume of the fuel storagecontainer 100.

The fuel storage container 100 is connected to the combustor 200 via thepipe 120, thus supplying the fuel oil stored in the fuel storagecontainer 100 to the combustor 200. The fuel storage container 100 maybe installed higher than the combustor 200, by means of which the fueloil stored in the fuel storage container 100 can be naturally suppliedto the combustor 200 without using any supply device.

The fuel storage container 100 is further provided with a support unit110 in order for the fuel storage container 100 to be installed higherthan the combustor 200, wherein the fuel storage container 100 issupported by the support unit 110.

Moreover, a fuel pump 130 may be connected to the pipe 120 so as tosmoothly supply the fuel oil stored in the fuel storage container 100irrespective of the position of the fuel storage container 100.

While it has been described in this embodiment that the fuel pump 130 isprovided for the sake of a smooth fuel supply of the fuel oil stored inthe fuel storage container 100, it will be apparent to anyone skilled inthe art that it is equally applicable to any other profiles whereinvarious devices, for example, a fuel heating (not illustrated) andsupply device (not illustrated) in addition to the fuel pump 130 may beconnected to the pipe 120.

Meanwhile, the combustor 200 may include, but is not limited to, agroove 210 defined in the longitudinal direction of the combustor 200,an ignition heater 280 provided in the longitudinal direction of thegroove 210 and adapted to generate heat, an ignition wick 220 a which isprovided at the top of the ignition heater 280 and is ignited by theheat while absorbing the fuel, and a pair of combustion wicks 220 bwhich are provided in the longitudinal direction of the combustor 200and are spaced apart at a certain distance from the ignition wick 220 a,thus combusting the fuel.

The combustor 200 has a certain length and as illustrated in the drawingis configured in a cylindrical shape one side of which is open. Thecombustor 200 is able to supply a lot of firepower at a time since ithas a certain length.

The combustor 200 may be provided in various shapes including a linearshape based on a predetermined situation, for example, a use purpose, aninstallation place, etc.

Moreover, while it has been described in this embodiment that thecombustor 200 is formed in a cylindrical shape, it will be apparent toanyone skilled in the art that it is equally applicable to any othershapes including a polygonal shape in addition to the aforementionedcylindrical shape.

Furthermore, in order to prevent the combustor 200 from moving, asupport member (not illustrated) may be provided at a lower portion ofthe combustor 200, thus preventing the combustion device 100 fromstopping or catching on fire due to the movement of the combustor 200during the operation of the combustion device 10.

Meanwhile, the combustor 200 may include, but is not limited to, aninner wall 260 a defining a combustion chamber 230, and an outer wall260 b defining an air supply chamber 240 together with the inner wall260 a.

A fuel oil, for example, a liquid animal or plant oil, is supplied tothe combustion chamber 230, and air is supplied to the air supplychamber 240 so as to efficiently combust the fuel which has beensupplied to the combustion chamber 230.

A metallic fuel supply pipe 270 is provided extending toward the groove210 so as to supply the fuel oil to the combustion chamber 230.

Moreover, a fuel adjusting device 271 may be provided between the fuelsupply pipe 270 and the pipe 120 so as to adjust the amount of the fuelwhich is inputted from the fuel storage container 100 to the combustor200, whereupon the user can readily adjust the amount of the fuelsupplied from the fuel storage container 100 to the combustor 200 insuch a way to adjust the fuel adjusting device 271.

An upper plate 261 may be provided at the top of the air supply chamber240 defined between the inner wall 260 a and the outer wall 260 b,wherein the upper plate 261 is engaged in a row to the inner wall 260 aand the outer wall 260 b. With the provision of the aforementioned upperplate 261, it is possible to enhance the engagement between the innerwall 260 a and the outer wall 260 b, and a flame plate 400, which willbe described later, can be engaged to the top of the upper plate 261.

Moreover, a first end plate 290 a may be provided at an end portion inthe longitudinal direction of the combustor 200 connected to an endportion of an air blower 300, which will be described later, so as toseal the combustion chamber 230, and a second end plate 290 b may beprovided at the other end in the longitudinal direction of the combustor200 so as to prevent the fuel oil and the air from leaking to theoutside of the combustor 200 in such a way to seal the combustionchamber 230 and the end portion of the air supply chamber 240.

A hole 291 is formed at the first end plate 290 a, wherein a part of thefuel supply pipe 270 will be inserted in the hole 291 so as to supplythe fuel oil to the groove 210.

Moreover, a groove 210 is formed in the longitudinal direction of thecombustor 200 and in the center of a bottom plate 262 adapted tointerconnect the inner wall 260 a and its neighboring inner wall 260 a.An ignition heater 280 may be provided in the longitudinal direction ofthe combustor 200 and in the groove 210 or a heat may be generated usingelectric power, gas, etc. While it has been described in this embodimentthat the ignition heater 280 is formed in a cylindrical shape, it willbe apparent to anyone skilled in the art that it is equally applicableto any other profiles, more specifically, the ignition heater 280 may beformed in various shapes including a cylindrical shape, a polygonalshape, etc.

An ignition wick 220 a is provided at the top of the ignition heater 280to ignite the combustion apparatus 10. The ignition wick 220 a can beignited if it receives a predetermined level heat from the ignitionheater 280 after it has absorbed the fuel oil stored in the groove 210.The ignition wick 220 a will be described in more detail later.

A pair of combustion wicks 220 b are provided at the bottom plate 262and are disposed spaced apart at a certain distance from the ignitionwick 220 a. The combustion wicks 220 b are made from the same materialas and in the same types as the ignition wick 220 a.

The fuel oil supplied from the fuel storage container 100 may be storedin the lower surface of the bottom plate 262 including the groove 210.Since the combustion wick 220 b, therefore, is able to maintain a statewherein it has absorbed the fuel oil, the flame of the ignition wick 220a may transfer to the combustion wicks 220 b, thus consequentlygenerating the firepower from three wicks.

Meanwhile, an end portion of the air supply chamber 240 is connected tothe air blower 300 and is able to receive air from the air blower 300.

Since the air can be sucked into the combustion chamber 230, theignition wick 220 a installed inside of the combustion chamber 230 canbe quickly ignited. Moreover, since air can be sufficiently supplied tothe inside of the combustion chamber 230, the fuel like a liquid animalor plant oil having a high viscosity can be prevented from burningincompletely.

A plurality of air holes 250 may be formed at the inner wall 260 a so asto enhance the combustion efficiency in the combustion chamber 230 whenthe air blower 300 supplies air to the combustion chamber 230 in thedistributed form.

A first air hole 250 a may be formed at the lowest portion of the innerwall 260 a between a pair of the inner walls 260 a so as to supply airwhich will be used to first combust the fuel inside of the combustionchamber 230.

The first combustion air hole 250 a may be formed higher than the wick,where corresponds to ½ of the height of the combustion chamber 230 andmay be formed spaced apart at a certain distance from the bottom plate262. If the air is supplied into the inside of the combustion chamber230 via the first combustion air hole 250 a, the air will circulatealong the inner wall surface of the combustion chamber 230 and may bespread up to over the portion which is lower than the lower end of thefirst combustion air hole 250 a. Since the air can be supplied to theignition wick 220 a positioning inside of the combustion chamber 230,the fuel oil which has been absorbed by the ignition wick 220 a can bereadily ignited. Moreover, since air is continuously supplied to theignited ignition wick 220 a, the fuel oil which has been absorbed by theignition wick 220 a can be thermally decomposed.

Moreover, a second combustion air hole 250 b may be formed at the top ofthe first combustion air hole 250 a so as to supply air which will beused to second combust the first combusted fuel. Here, the secondcombustion air hole 250 b may be formed at a portion which correspondsto ½ of the height of the combustion chamber 230.

Meanwhile, the aforementioned second combustion air hole 250 b may beformed at another inner wall 260 a which makes a pair with the innerwall 260 a where the first combustion air hole 250 a is formed.

Likewise, the reason why the second combustion air hole 250 b is formedin the direction where the first combustion air hole 250 a is not formedis that it can move while forming curves inside of the combustionchamber 230, and the air can circulate evenly inside of the combustionchamber 230 with the aid of the aforementioned movements.

With the aid of the aforementioned configuration, a thermaldecomposition layer (D) can be formed at a lower portion of thecombustion chamber 230, and a combustion layer (C) can be formed at anupper portion of the combustion chamber 230.

The thermal decomposition layer (D) is a layer where the fuel oilabsorbed by the ignition wick 220 a made of a ceramic fiber material isdecomposed by the heat.

The combustion procedure at the thermal decomposition layer (D) will bedescribed. The viscosity of the fuel oil into which a radiation energyof the ignition wick 220 a made of a ceramic fiber material istransferred, is lowered, and the fuel oil the viscosity of which hasbeen lowered, will ascend toward the top of the ignition wick 220 a withthe aid of the capillary phenomenon. Moreover, since the temperature ofthe ignition wick 220 a increases, the fuel oil can be readilydecomposed inside of the thermal decomposition layer (D), whereby a heatrecirculation will occur between the ignition wick 220 a made of aceramic fiber material and a combustion flame, thus generating a hightemperature flame through a continuous fuel supply and a continuous airsupply. The fuel oil which has been thermally decomposed at the thermaldecomposition layer (D) by the air supplied from the first combustionair hole 250 a may be converted into gas and may be supplied to thecombustion layer (C). The combustion layer (C) is a layer where a hightemperature gas combusts. The high temperature gas supplied from thethermal decomposition layer (D) is mixed with the air supplied from thesecond combustion air hole 250 b and then is combusted. The fuel oil,for example, a liquid animal or plant oil, having a high viscosity,therefore, can be completely combusted, thus reducing the generation oftar.

Meanwhile, a plurality of flame alignment air holes 250 c are formed atregular distances in the longitudinal direction at the tops of a pair ofthe inner walls 260 a which define the combustor 200. The aforementionedflame alignment air holes 250 c are provided to guide toward the centerthe flame which is erupting from the combustor 200.

Since the first combustion air hole 250 a and the second combustion airhole 250 b are formed at the combustor 200, the flame from the combustor200 may erupt ascending in the slanted direction, not erupting andascending in the vertical direction. In order to prevent the flame fromerupting in the slanted direction, air is injected toward the center ofthe combustor 200 via the flame alignment air holes 250 c just beforethe flame is erupted from the combustor 200, whereby it is possible toalign the flame erupting from the combustor 200 toward the center.

The ignition wick 220 a is made of an inflammable ceramic-like fiberwherein a thread is woven crossing in vertical and horizontal directionson a lattice-shaped metallic wire mesh. A wick leg part 221 can bemanufactured using the vertical threads which are left behind after thehorizontal threads at a lower portion of the fiber has been removed by apredetermined height. The reason why the wick leg part 221 is formed atthe ignition wick 220 a is that a part of a high temperature gas at thecombustion layer (C) formed at an upper portion of the combustionchamber 230 can circulate over a lower end of the combustion wick, andthe viscosity of the fuel oil stored at a lower portion of the ignitionwick 220 a can decrease, whereupon the aforementioned fuel oil can bequickly absorbed by the ignition wick 220 a with the aid of thecapillary phenomenon.

Meanwhile, at the top of the combustor 200, there are installed aceramic member 410 which is able to completely combust the fuel whichhas been incompletely combusted by the combustor 200 by reheating theincompletely combusted fuel, and a flame plate 400 which is equippedwith a discharge port 420 through which the combusted air can beemitted.

The flame plate 400 is able to completely combust the gas which has beenincompletely combusted by the combustor 200, using a high temperatureflame in such a way to converge the flame through the discharge port 420the width of which is narrower than that of the combustor 200. Most ofthe emitting gas is discharged via the discharge port 420 after it hasbeen contacted with the ceramic member 410.

Since the ceramic member 410 is in a heated state after it has beenmounted on the top of the combustor 200, the gas which is emitted fromthe combustor 200 is reheated by the radiation energy which is radiatingfrom the ceramic member 410, whereupon the gas which has beenincompletely combusted by the combustor 200 can be completely combustedas it passes through the narrow discharge port 420 which has been heatedby the flame plate 400.

Even though a liquid animal or plant oil is used as the fuel oil of thecombustion apparatus 10, it can be completely combusted, thus reducingthe generation of tar which tends to generate in case of the incompletecombustion.

Meanwhile, an air blower 300 may be installed at an end portion of theair supply chamber 240 so as to supply air to the combustor 200.

The air blower 300 adapted to supply air to the combustor 200 will bedescribed.

FIG. 4 is a perspective view illustrating an air blower according to anembodiment of the present invention.

As illustrated in FIG. 4, the air blower 300 according to an embodimentof the present invention may include, but is not limited to, an airblowing fan 310 which is engaged to a motor shaft and is adapted togenerate wind, and an air blowing duct 320 which is adapted to guide thewind from the air blowing fan 310 to an air supply chamber 240.

The air blowing unit 300 is engaged to the combustor 200 via an engagingmember 340, for example, a screw, etc. A through hole 321 may be formedat one surface of the air blowing duct 320, wherein the fuel supply pipe270 is passing through the through hole 321.

The air, therefore, can be supplied to the air supply chamber 240 viathe air blowing duct 320, and the fuel can be supplied to the combustionchamber 230 via the fuel supply pipe 270.

As the present invention may be embodied in several forms withoutdeparting from the spirit or essential characteristics thereof, itshould also be understood that the above-described examples are notlimited by any of the details of the foregoing description, unlessotherwise specified, but rather should be construed broadly within itsspirit and scope as defined in the appended claims, and therefore allchanges and modifications that fall within the meets and bounds of theclaims, or equivalences of such meets and bounds are therefore intendedto be embraced by the appended claims.

1. A combustion apparatus, comprising: a fuel storage container which isadapted to store fuel; a combustor which has a certain length andconnected to the fuel storage container and a pipe so as to be suppliedwith fuel and combust fuel; an air blower which is disposed at one endof the combustor and supplying air into the combustor; and a flame platewhich is disposed over the combustor in a longitudinal direction andperfectly combusting air that is imperfectly combusted in the combustor,wherein the combustor comprises: a groove which is formed in alongitudinal direction of the combustor; an ignition heater which isdisposed in the longitudinal direction of the groove and generatingheat; an ignition wick which is disposed over the ignition heater,absorbing fuel, and igniting by heat; and a pair of combustion wickswhich are disposed in the longitudinal direction of the combustor so asto be spaced away from the ignition wick by a certain distance andcombusting fuel.
 2. The apparatus of claim 1, wherein the combustorfurther comprises: a combustion chamber wherein the fuel supplied fromthe fuel storage container can be com busted; and an air supply chamberwhich is able to receive air from the air blower and supply the air tothe combustion chamber, wherein a plurality of air holes are formedbetween the air supply chamber and the combustion chamber so as tosupply air of the air supply chamber in order for the fuel, which hasbeen supplied into the combustion chamber, to be efficiently combusted.3. The apparatus of claim 2, wherein the combustor comprises: an innerwall which is equipped with a plurality of air holes at its sidesurface; and an outer wall which is installed spaced apart at a certaindistance from the inner wall from an outer side of the inner wall anddefines the air supply chamber together with the inner wall.
 4. Theapparatus of claim 3, wherein the air hole comprises a first combustionair hole which is formed at a lower portion of the inner wall and isadapted to supply air which will be used to first combust the fuelstored in the combustion chamber.
 5. The apparatus of claim 4, whereinthe air hole comprises a second combustion air hole which is formed atan upper portion of the first combustion air hole and is adapted tosecond combust the fuel which has been first combusted.
 6. The apparatusof claim 5, wherein the air hole further comprises a plurality of flamealignment air holes which are formed at regular distances at an upperportion of the second combustion air hole and are adapted to aligntoward the center the flame which has been combusted in the combustionchamber.
 7. The apparatus of claim 3, further comprising: a metallicfuel supply pipe which is installed extending from the groove, wherein afuel adjusting device is provided between the fuel supply pipe and thepipe so as to adjust the amount of the fuel which is inputted into thecombustor.
 8. The apparatus of claim 7, wherein the air blowercomprises: an air blowing fan which is engaged to a motor shaft and isadapted to generate wind; and an air blowing duct which is able to guidetoward the air supply chamber the air which is being blown from the airblowing fan, wherein the air blowing duct is equipped with a throughhole through which the fuel supply pipe passes through.
 9. The apparatusof claim 2, wherein the flame plate comprises: a ceramic member which isprovided at an upper portion of the combustor and is able to completelycombust the gas, which has been incompletely combusted by the combustor,in such a way to reheat the incompletely com busted gas; and a dischargeport which is formed smaller than the width of the combustion chamberwith the aid of the ceramic member, thus discharging the gas com bustedby the combustor.
 10. The apparatus of claim 1, wherein a fuel pump isinstalled at the pipe so as to smoothly supply the fuel to thecombustor.